launcher: purge auth Mojang (depreciee), Microsoft uniquement

- bootstrap: validateSelected() ne tente plus de sign-in Mojang
- suppression formulaire login.ejs / login.js et de la vue login
- authmanager: retrait addMojangAccount/removeMojangAccount/mojangErrorDisplayable
- configmanager: retrait clientToken et helpers comptes Mojang
- settings/processbuilder: flux Microsoft uniquement (user_type=msa)
- landing: retrait du refresh de statut Mojang (fonction + UI + CSS)

launcher/app/assets/js/processbuilder.js

@@ -616,7 +616,7 @@ class ProcessBuilder {
                             val = this.authUser.accessToken
                             break
                         case 'user_type':
-                            val = this.authUser.type === 'microsoft' ? 'msa' : 'mojang'
+                            val = 'msa'
                             break
                         case 'version_type':
                             val = this.vanillaManifest.type
@@ -700,7 +700,7 @@ class ProcessBuilder {
                         val = this.authUser.accessToken
                         break
                     case 'user_type':
-                        val = this.authUser.type === 'microsoft' ? 'msa' : 'mojang'
+                        val = 'msa'
                         break
                     case 'user_properties': // 1.8.9 and below.
                         val = '{}'